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PATENTE!) FEB 42868 eL-A @einen tatrs uttat @fitta being simply used for protecting the wor @5mm/aud. EDWIN BROWN, OF ROXBUR'Y, AND EDWIN W. BR WN, ASSlGrNORSv TO EDWIN W. BROWN, OF BOSTON, MASSAGHUSEFTS.

Letters Patent No. 73,948, dated .February 4, 1868; amedaled January '24, 1868.

MPROVEMENTS IN PHOTOGRAPHE-PRINTING APPARATUS.

TO ALL WHOM- IT MAY CONCERN:

-Be it known that we, EDWIN BROWN, of Roxbury, Norfolk county, Massachusetts, and EDWIN W. BROWN,

of Boston, Suiolk county, Massachusetts, have invented a new and improved Photographic-Printing Appa.

ratus; and nie do hereby declare that the following is a full, clear, and exact'description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

' The presentinvention relates to an apparatus for printing of photographs, and to that class of such printing known as and commonly called by photographers sketching Heretefore, this sketching has usually been done either by blocking, so termed, or vby moving, with the hands', the sketching-frame or card over the plate while exposed to the sun, in such a manner as to cause the outline to the picture to be suiliciently broken, and rendered obscure or indefinite, or, in other words, sketched,` as it is termed. But by blocking much care is req'uired to adjust and set the sketching-frame or block upon the plate, for if it be not properly set, an imperfect picture or sketch is the result. 'Arnd although to sketchby blocking requires less time and attention on the part of the operator or printer, than to sketch by moving the frame, for reasons which are self-obvious, the latter mode has neverthelessbeen generally preferred, especially for the best work'or printing, by photographers, as by it more perfect andsatisfactory prints or sketches could besecured than by blocking. But as sketch ing, by moving the frame with the hands over the plate, vrequired 'necessarily the constant attendance of the printer, or at least some person, it has therefore not been so generally adopted or practised as it would have been if to the frame the motion could have been imparted automatically,- Therefore, the object of the present invention, and which is satisfactorily accomplished thereby, is to so connect and arrange the sketching-frame or card, to and with any suitable driving-power or mechanism, that it will be automatically moved over and across the plate with the motion that is required, in order to produce the -proper sketch or print therefrom; the arrangement and constructionof the parts beingalso such as to enable them to be properly adjusted to pictures of various sizes, and to sketching more or less of the impression upon the plate.

In the accompanying plate of drawings our improved mode of automatically operating the sketchingframe is illustrated, it being shown in connection with a train of gearing similar to the common movement of a clock, and-as adapted to receive its motion therefrom.

Figure 1 is a plan or top view of the case to the clock-movement, showing the means of, connection with a sketching-frame, and also the outlines of an ordinary frame for holding the negative-plate.

Figure 2, a. plan or top view of the connecting parts between the sketchingthat in fig. 1 were not shown, owing to their location 3 and Figure 3, an edge view of the parts shown in iig. 2.

Similar. letters of reference indicate corresponding parts.

A, in the drawings, represents a frame or skeleton box, to the ordinary works or movement toa clock, for operating means are employed. B, a box or case,

frame and operating-mechauism,

which encases or encloses a train of gearing similar which, one or more coiled springs or other suitable in which the skeleton frame Ais placed and secured; this box B ks or gearing from injury. C, one of the spindles or shafts to the train of gearing or clock-movement, to which spindle a disk or plate, D, is fixed, having a series of holes or apertures, a, through it at different distances from the centre, in one of which, according as may be desired, for a purpose to be hereinafter stated, is hung by and upon'a pin, E, one end of a connecting-rod, F. This rod F posses out through an opening, G, in the'front end, to the box B, and at its outer end, H, has screwed or otherwiseiixed to it, a clamp, I, for being clamped or fastened to an ordinary sketching-frame or card, such as shown in the drawings, lig. 2, and marked L. The rod F, hereinabove referred to, between the end at which it is hung to the shaft-wheel D, and the end by which it is clamped to the sketchingframe, passes through a guide, M, at one end of an arm, N, placed under the seid rod F. This arm is extended through the opening G in the box B, and by a slot, O, moves upon a pin, P, xed in, th`e under side of the frame A, when, through the revolution of the eccentric Q, to which it is hung, it is operated. This eccentric, Q, is fixed to one, It, of thespindles or shafts of the clock-movement. The dotted line in iig. 1 represents the frame for the negative-plate, which frame, in any suitable manner, is to be secured to theextension S of the box B, under the plane of movement of the sketching-frame Il, with the opening to the' sketchingfrume over the part of the picture which it is desired to print by sketching. By the running of the 'clock-movement, the rod F is made to move in and out through the guide M, carrying the. sketching-frame' with it over the plate, in the direction of its length, while, at the same time, by the revolution of the eccentric, Q, the said guide M to the rod is continually changed in position, not only from right or left, but to positions more or less distant-from the operating centre C, to the frame carrying rod F, correspondingly changing the ccurseor movement of the sketchingframe over-fthe plate, or, in other words, causing it to have a rolling motion across the plate from one side to the other, and-from end to end, greatly resemblingvthe motion whiclrhas heretofore been imparted to the sketching-frame by hand-labor, and which it is absolutelynecessary it should have, in order to perfectly break up the outline to the picture, or to Ssketch it, as it is termed. i c

From the above descriptionof our improved connection, and the manner in which the same operates to sketch a picture, it is plainly apparent that if the gearing for running the two shafts to which the framecarrying-rod is hung, and the guide for such rod'be properly calculated as to their relative sizes, such a movement can be given to the sketching-frame, that, for the complete running down of the operating-springs or their equivalents, it will not pass over exactly thelsame course or line more than once, but will be moving always upon a different line, thus insuring the more perfect' breaking up of the outline, and consequently the better sketch or print. And furthermore, it maybe here remarked, that although we have described the sketching -frame as receiving its power through a train of gearing similar to clock-movement, other formsof drivingi mechanism may be employed,and in that, therefore, we do not intend to limit ourselves, either to any one particular motor, or to any arrangement of mechanism between the motor and rod carrying the sketching-frame, as well as the guide to such rod, the'present .invention consisting simply in sol connecting a sketching-frame with any suitable operating-mechanism, that tosuch frame the requisite motion over the photographic plate, will he automatically given, substantially as and by the means, or their equivalents, hereinabove particularly described.

The purpose of the several holes hereinabove described, as in .the wheel D, is to enable a longer or shorter stroke tolbe given to; the frame-carrying rod F, according as may he desired for sketching this or that print.

l Having thus described our invention, what we claim as new, and desire to secureA by Letters Patent, is=

I. So connecting a frame suitable for sketching photographic prints, to and with any proper operatingmechanism, that such frame will be moved over and across the picture as it is being printed substantially as and for the purpose described,

2. We also claim the rod F, carrying the sketching-frame and guide M, or their respective equivalents, in combination with each other, and when so arranged together, and with reference to the operating-mechanism, as to impart to the frame the movement requisite for sketching, substantially as described.

The above specification of our invention signedby us, this day of April, A. 1867.

EDWIN BROWN, EDWIN W. BROWN..

Witnesses:

Isaac WOODWARD, It. F. RAYMOND. 

